Moderna was seeking approval for the vaccine's use in adults over 50.
Holiday travel is in full swing and flu cases are ramping up. Some experts are worried about a new flu variant making its way to Southern California.
New York City is seeing some of the highest levels in the country.
Concerns about the spread of influenza are growing in the U.S. as the U.K. sees a flu surge in children and young adults.
With all the hustle and bustle, holiday travel is expected to surge at the exact time as the flu. Here's how experts say you can keep your family healthy.
A young Michigan boy is issuing a warning about the flu, after a case of it changed his whole life.